IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.0.134.0/23

network10.0.134.0/23

broadcast10.0.135.255

first host10.0.134.1

last host10.0.135.254

subnet mask255.255.254.0

wildcard0.0.1.255

addresses512

usable hosts510

classA

ipcalc 10.0.134.0/23

address00001010.00000000.10000110.00000000

subnet mask11111111.11111111.11111110.00000000

network00001010.00000000.10000110.00000000

broadcast00001010.00000000.10000111.11111111

green = network part, grey = host part

hex0x0a008600

decimal167806464

reverse dns0.134.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:8600

/23 split into /31 · 256 subnets

close ×

#	network	host range	broadcast
1	10.0.134.0/31	10.0.134.0 – 10.0.134.1	10.0.134.1
2	10.0.134.2/31	10.0.134.2 – 10.0.134.3	10.0.134.3
3	10.0.134.4/31	10.0.134.4 – 10.0.134.5	10.0.134.5
4	10.0.134.6/31	10.0.134.6 – 10.0.134.7	10.0.134.7
5	10.0.134.8/31	10.0.134.8 – 10.0.134.9	10.0.134.9
6	10.0.134.10/31	10.0.134.10 – 10.0.134.11	10.0.134.11
7	10.0.134.12/31	10.0.134.12 – 10.0.134.13	10.0.134.13
8	10.0.134.14/31	10.0.134.14 – 10.0.134.15	10.0.134.15
9	10.0.134.16/31	10.0.134.16 – 10.0.134.17	10.0.134.17
10	10.0.134.18/31	10.0.134.18 – 10.0.134.19	10.0.134.19
11	10.0.134.20/31	10.0.134.20 – 10.0.134.21	10.0.134.21
12	10.0.134.22/31	10.0.134.22 – 10.0.134.23	10.0.134.23
13	10.0.134.24/31	10.0.134.24 – 10.0.134.25	10.0.134.25
14	10.0.134.26/31	10.0.134.26 – 10.0.134.27	10.0.134.27
15	10.0.134.28/31	10.0.134.28 – 10.0.134.29	10.0.134.29
16	10.0.134.30/31	10.0.134.30 – 10.0.134.31	10.0.134.31
17	10.0.134.32/31	10.0.134.32 – 10.0.134.33	10.0.134.33
18	10.0.134.34/31	10.0.134.34 – 10.0.134.35	10.0.134.35
19	10.0.134.36/31	10.0.134.36 – 10.0.134.37	10.0.134.37
20	10.0.134.38/31	10.0.134.38 – 10.0.134.39	10.0.134.39
21	10.0.134.40/31	10.0.134.40 – 10.0.134.41	10.0.134.41
22	10.0.134.42/31	10.0.134.42 – 10.0.134.43	10.0.134.43
23	10.0.134.44/31	10.0.134.44 – 10.0.134.45	10.0.134.45
24	10.0.134.46/31	10.0.134.46 – 10.0.134.47	10.0.134.47
25	10.0.134.48/31	10.0.134.48 – 10.0.134.49	10.0.134.49
26	10.0.134.50/31	10.0.134.50 – 10.0.134.51	10.0.134.51
27	10.0.134.52/31	10.0.134.52 – 10.0.134.53	10.0.134.53
28	10.0.134.54/31	10.0.134.54 – 10.0.134.55	10.0.134.55
29	10.0.134.56/31	10.0.134.56 – 10.0.134.57	10.0.134.57
30	10.0.134.58/31	10.0.134.58 – 10.0.134.59	10.0.134.59
31	10.0.134.60/31	10.0.134.60 – 10.0.134.61	10.0.134.61
32	10.0.134.62/31	10.0.134.62 – 10.0.134.63	10.0.134.63
33	10.0.134.64/31	10.0.134.64 – 10.0.134.65	10.0.134.65
34	10.0.134.66/31	10.0.134.66 – 10.0.134.67	10.0.134.67
35	10.0.134.68/31	10.0.134.68 – 10.0.134.69	10.0.134.69
36	10.0.134.70/31	10.0.134.70 – 10.0.134.71	10.0.134.71
37	10.0.134.72/31	10.0.134.72 – 10.0.134.73	10.0.134.73
38	10.0.134.74/31	10.0.134.74 – 10.0.134.75	10.0.134.75
39	10.0.134.76/31	10.0.134.76 – 10.0.134.77	10.0.134.77
40	10.0.134.78/31	10.0.134.78 – 10.0.134.79	10.0.134.79
41	10.0.134.80/31	10.0.134.80 – 10.0.134.81	10.0.134.81
42	10.0.134.82/31	10.0.134.82 – 10.0.134.83	10.0.134.83
43	10.0.134.84/31	10.0.134.84 – 10.0.134.85	10.0.134.85
44	10.0.134.86/31	10.0.134.86 – 10.0.134.87	10.0.134.87
45	10.0.134.88/31	10.0.134.88 – 10.0.134.89	10.0.134.89
46	10.0.134.90/31	10.0.134.90 – 10.0.134.91	10.0.134.91
47	10.0.134.92/31	10.0.134.92 – 10.0.134.93	10.0.134.93
48	10.0.134.94/31	10.0.134.94 – 10.0.134.95	10.0.134.95
49	10.0.134.96/31	10.0.134.96 – 10.0.134.97	10.0.134.97
50	10.0.134.98/31	10.0.134.98 – 10.0.134.99	10.0.134.99
51	10.0.134.100/31	10.0.134.100 – 10.0.134.101	10.0.134.101
52	10.0.134.102/31	10.0.134.102 – 10.0.134.103	10.0.134.103
53	10.0.134.104/31	10.0.134.104 – 10.0.134.105	10.0.134.105
54	10.0.134.106/31	10.0.134.106 – 10.0.134.107	10.0.134.107
55	10.0.134.108/31	10.0.134.108 – 10.0.134.109	10.0.134.109
56	10.0.134.110/31	10.0.134.110 – 10.0.134.111	10.0.134.111
57	10.0.134.112/31	10.0.134.112 – 10.0.134.113	10.0.134.113
58	10.0.134.114/31	10.0.134.114 – 10.0.134.115	10.0.134.115
59	10.0.134.116/31	10.0.134.116 – 10.0.134.117	10.0.134.117
60	10.0.134.118/31	10.0.134.118 – 10.0.134.119	10.0.134.119
61	10.0.134.120/31	10.0.134.120 – 10.0.134.121	10.0.134.121
62	10.0.134.122/31	10.0.134.122 – 10.0.134.123	10.0.134.123
63	10.0.134.124/31	10.0.134.124 – 10.0.134.125	10.0.134.125
64	10.0.134.126/31	10.0.134.126 – 10.0.134.127	10.0.134.127
65	10.0.134.128/31	10.0.134.128 – 10.0.134.129	10.0.134.129
66	10.0.134.130/31	10.0.134.130 – 10.0.134.131	10.0.134.131
67	10.0.134.132/31	10.0.134.132 – 10.0.134.133	10.0.134.133
68	10.0.134.134/31	10.0.134.134 – 10.0.134.135	10.0.134.135
69	10.0.134.136/31	10.0.134.136 – 10.0.134.137	10.0.134.137
70	10.0.134.138/31	10.0.134.138 – 10.0.134.139	10.0.134.139
71	10.0.134.140/31	10.0.134.140 – 10.0.134.141	10.0.134.141
72	10.0.134.142/31	10.0.134.142 – 10.0.134.143	10.0.134.143
73	10.0.134.144/31	10.0.134.144 – 10.0.134.145	10.0.134.145
74	10.0.134.146/31	10.0.134.146 – 10.0.134.147	10.0.134.147
75	10.0.134.148/31	10.0.134.148 – 10.0.134.149	10.0.134.149
76	10.0.134.150/31	10.0.134.150 – 10.0.134.151	10.0.134.151
77	10.0.134.152/31	10.0.134.152 – 10.0.134.153	10.0.134.153
78	10.0.134.154/31	10.0.134.154 – 10.0.134.155	10.0.134.155
79	10.0.134.156/31	10.0.134.156 – 10.0.134.157	10.0.134.157
80	10.0.134.158/31	10.0.134.158 – 10.0.134.159	10.0.134.159
81	10.0.134.160/31	10.0.134.160 – 10.0.134.161	10.0.134.161
82	10.0.134.162/31	10.0.134.162 – 10.0.134.163	10.0.134.163
83	10.0.134.164/31	10.0.134.164 – 10.0.134.165	10.0.134.165
84	10.0.134.166/31	10.0.134.166 – 10.0.134.167	10.0.134.167
85	10.0.134.168/31	10.0.134.168 – 10.0.134.169	10.0.134.169
86	10.0.134.170/31	10.0.134.170 – 10.0.134.171	10.0.134.171
87	10.0.134.172/31	10.0.134.172 – 10.0.134.173	10.0.134.173
88	10.0.134.174/31	10.0.134.174 – 10.0.134.175	10.0.134.175
89	10.0.134.176/31	10.0.134.176 – 10.0.134.177	10.0.134.177
90	10.0.134.178/31	10.0.134.178 – 10.0.134.179	10.0.134.179
91	10.0.134.180/31	10.0.134.180 – 10.0.134.181	10.0.134.181
92	10.0.134.182/31	10.0.134.182 – 10.0.134.183	10.0.134.183
93	10.0.134.184/31	10.0.134.184 – 10.0.134.185	10.0.134.185
94	10.0.134.186/31	10.0.134.186 – 10.0.134.187	10.0.134.187
95	10.0.134.188/31	10.0.134.188 – 10.0.134.189	10.0.134.189
96	10.0.134.190/31	10.0.134.190 – 10.0.134.191	10.0.134.191
97	10.0.134.192/31	10.0.134.192 – 10.0.134.193	10.0.134.193
98	10.0.134.194/31	10.0.134.194 – 10.0.134.195	10.0.134.195
99	10.0.134.196/31	10.0.134.196 – 10.0.134.197	10.0.134.197
100	10.0.134.198/31	10.0.134.198 – 10.0.134.199	10.0.134.199
101	10.0.134.200/31	10.0.134.200 – 10.0.134.201	10.0.134.201
102	10.0.134.202/31	10.0.134.202 – 10.0.134.203	10.0.134.203
103	10.0.134.204/31	10.0.134.204 – 10.0.134.205	10.0.134.205
104	10.0.134.206/31	10.0.134.206 – 10.0.134.207	10.0.134.207
105	10.0.134.208/31	10.0.134.208 – 10.0.134.209	10.0.134.209
106	10.0.134.210/31	10.0.134.210 – 10.0.134.211	10.0.134.211
107	10.0.134.212/31	10.0.134.212 – 10.0.134.213	10.0.134.213
108	10.0.134.214/31	10.0.134.214 – 10.0.134.215	10.0.134.215
109	10.0.134.216/31	10.0.134.216 – 10.0.134.217	10.0.134.217
110	10.0.134.218/31	10.0.134.218 – 10.0.134.219	10.0.134.219
111	10.0.134.220/31	10.0.134.220 – 10.0.134.221	10.0.134.221
112	10.0.134.222/31	10.0.134.222 – 10.0.134.223	10.0.134.223
113	10.0.134.224/31	10.0.134.224 – 10.0.134.225	10.0.134.225
114	10.0.134.226/31	10.0.134.226 – 10.0.134.227	10.0.134.227
115	10.0.134.228/31	10.0.134.228 – 10.0.134.229	10.0.134.229
116	10.0.134.230/31	10.0.134.230 – 10.0.134.231	10.0.134.231
117	10.0.134.232/31	10.0.134.232 – 10.0.134.233	10.0.134.233
118	10.0.134.234/31	10.0.134.234 – 10.0.134.235	10.0.134.235
119	10.0.134.236/31	10.0.134.236 – 10.0.134.237	10.0.134.237
120	10.0.134.238/31	10.0.134.238 – 10.0.134.239	10.0.134.239
121	10.0.134.240/31	10.0.134.240 – 10.0.134.241	10.0.134.241
122	10.0.134.242/31	10.0.134.242 – 10.0.134.243	10.0.134.243
123	10.0.134.244/31	10.0.134.244 – 10.0.134.245	10.0.134.245
124	10.0.134.246/31	10.0.134.246 – 10.0.134.247	10.0.134.247
125	10.0.134.248/31	10.0.134.248 – 10.0.134.249	10.0.134.249
126	10.0.134.250/31	10.0.134.250 – 10.0.134.251	10.0.134.251
127	10.0.134.252/31	10.0.134.252 – 10.0.134.253	10.0.134.253
128	10.0.134.254/31	10.0.134.254 – 10.0.134.255	10.0.134.255
129	10.0.135.0/31	10.0.135.0 – 10.0.135.1	10.0.135.1
130	10.0.135.2/31	10.0.135.2 – 10.0.135.3	10.0.135.3
131	10.0.135.4/31	10.0.135.4 – 10.0.135.5	10.0.135.5
132	10.0.135.6/31	10.0.135.6 – 10.0.135.7	10.0.135.7
133	10.0.135.8/31	10.0.135.8 – 10.0.135.9	10.0.135.9
134	10.0.135.10/31	10.0.135.10 – 10.0.135.11	10.0.135.11
135	10.0.135.12/31	10.0.135.12 – 10.0.135.13	10.0.135.13
136	10.0.135.14/31	10.0.135.14 – 10.0.135.15	10.0.135.15
137	10.0.135.16/31	10.0.135.16 – 10.0.135.17	10.0.135.17
138	10.0.135.18/31	10.0.135.18 – 10.0.135.19	10.0.135.19
139	10.0.135.20/31	10.0.135.20 – 10.0.135.21	10.0.135.21
140	10.0.135.22/31	10.0.135.22 – 10.0.135.23	10.0.135.23
141	10.0.135.24/31	10.0.135.24 – 10.0.135.25	10.0.135.25
142	10.0.135.26/31	10.0.135.26 – 10.0.135.27	10.0.135.27
143	10.0.135.28/31	10.0.135.28 – 10.0.135.29	10.0.135.29
144	10.0.135.30/31	10.0.135.30 – 10.0.135.31	10.0.135.31
145	10.0.135.32/31	10.0.135.32 – 10.0.135.33	10.0.135.33
146	10.0.135.34/31	10.0.135.34 – 10.0.135.35	10.0.135.35
147	10.0.135.36/31	10.0.135.36 – 10.0.135.37	10.0.135.37
148	10.0.135.38/31	10.0.135.38 – 10.0.135.39	10.0.135.39
149	10.0.135.40/31	10.0.135.40 – 10.0.135.41	10.0.135.41
150	10.0.135.42/31	10.0.135.42 – 10.0.135.43	10.0.135.43
151	10.0.135.44/31	10.0.135.44 – 10.0.135.45	10.0.135.45
152	10.0.135.46/31	10.0.135.46 – 10.0.135.47	10.0.135.47
153	10.0.135.48/31	10.0.135.48 – 10.0.135.49	10.0.135.49
154	10.0.135.50/31	10.0.135.50 – 10.0.135.51	10.0.135.51
155	10.0.135.52/31	10.0.135.52 – 10.0.135.53	10.0.135.53
156	10.0.135.54/31	10.0.135.54 – 10.0.135.55	10.0.135.55
157	10.0.135.56/31	10.0.135.56 – 10.0.135.57	10.0.135.57
158	10.0.135.58/31	10.0.135.58 – 10.0.135.59	10.0.135.59
159	10.0.135.60/31	10.0.135.60 – 10.0.135.61	10.0.135.61
160	10.0.135.62/31	10.0.135.62 – 10.0.135.63	10.0.135.63
161	10.0.135.64/31	10.0.135.64 – 10.0.135.65	10.0.135.65
162	10.0.135.66/31	10.0.135.66 – 10.0.135.67	10.0.135.67
163	10.0.135.68/31	10.0.135.68 – 10.0.135.69	10.0.135.69
164	10.0.135.70/31	10.0.135.70 – 10.0.135.71	10.0.135.71
165	10.0.135.72/31	10.0.135.72 – 10.0.135.73	10.0.135.73
166	10.0.135.74/31	10.0.135.74 – 10.0.135.75	10.0.135.75
167	10.0.135.76/31	10.0.135.76 – 10.0.135.77	10.0.135.77
168	10.0.135.78/31	10.0.135.78 – 10.0.135.79	10.0.135.79
169	10.0.135.80/31	10.0.135.80 – 10.0.135.81	10.0.135.81
170	10.0.135.82/31	10.0.135.82 – 10.0.135.83	10.0.135.83
171	10.0.135.84/31	10.0.135.84 – 10.0.135.85	10.0.135.85
172	10.0.135.86/31	10.0.135.86 – 10.0.135.87	10.0.135.87
173	10.0.135.88/31	10.0.135.88 – 10.0.135.89	10.0.135.89
174	10.0.135.90/31	10.0.135.90 – 10.0.135.91	10.0.135.91
175	10.0.135.92/31	10.0.135.92 – 10.0.135.93	10.0.135.93
176	10.0.135.94/31	10.0.135.94 – 10.0.135.95	10.0.135.95
177	10.0.135.96/31	10.0.135.96 – 10.0.135.97	10.0.135.97
178	10.0.135.98/31	10.0.135.98 – 10.0.135.99	10.0.135.99
179	10.0.135.100/31	10.0.135.100 – 10.0.135.101	10.0.135.101
180	10.0.135.102/31	10.0.135.102 – 10.0.135.103	10.0.135.103
181	10.0.135.104/31	10.0.135.104 – 10.0.135.105	10.0.135.105
182	10.0.135.106/31	10.0.135.106 – 10.0.135.107	10.0.135.107
183	10.0.135.108/31	10.0.135.108 – 10.0.135.109	10.0.135.109
184	10.0.135.110/31	10.0.135.110 – 10.0.135.111	10.0.135.111
185	10.0.135.112/31	10.0.135.112 – 10.0.135.113	10.0.135.113
186	10.0.135.114/31	10.0.135.114 – 10.0.135.115	10.0.135.115
187	10.0.135.116/31	10.0.135.116 – 10.0.135.117	10.0.135.117
188	10.0.135.118/31	10.0.135.118 – 10.0.135.119	10.0.135.119
189	10.0.135.120/31	10.0.135.120 – 10.0.135.121	10.0.135.121
190	10.0.135.122/31	10.0.135.122 – 10.0.135.123	10.0.135.123
191	10.0.135.124/31	10.0.135.124 – 10.0.135.125	10.0.135.125
192	10.0.135.126/31	10.0.135.126 – 10.0.135.127	10.0.135.127
193	10.0.135.128/31	10.0.135.128 – 10.0.135.129	10.0.135.129
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196	10.0.135.134/31	10.0.135.134 – 10.0.135.135	10.0.135.135
197	10.0.135.136/31	10.0.135.136 – 10.0.135.137	10.0.135.137
198	10.0.135.138/31	10.0.135.138 – 10.0.135.139	10.0.135.139
199	10.0.135.140/31	10.0.135.140 – 10.0.135.141	10.0.135.141
200	10.0.135.142/31	10.0.135.142 – 10.0.135.143	10.0.135.143
201	10.0.135.144/31	10.0.135.144 – 10.0.135.145	10.0.135.145
202	10.0.135.146/31	10.0.135.146 – 10.0.135.147	10.0.135.147
203	10.0.135.148/31	10.0.135.148 – 10.0.135.149	10.0.135.149
204	10.0.135.150/31	10.0.135.150 – 10.0.135.151	10.0.135.151
205	10.0.135.152/31	10.0.135.152 – 10.0.135.153	10.0.135.153
206	10.0.135.154/31	10.0.135.154 – 10.0.135.155	10.0.135.155
207	10.0.135.156/31	10.0.135.156 – 10.0.135.157	10.0.135.157
208	10.0.135.158/31	10.0.135.158 – 10.0.135.159	10.0.135.159
209	10.0.135.160/31	10.0.135.160 – 10.0.135.161	10.0.135.161
210	10.0.135.162/31	10.0.135.162 – 10.0.135.163	10.0.135.163
211	10.0.135.164/31	10.0.135.164 – 10.0.135.165	10.0.135.165
212	10.0.135.166/31	10.0.135.166 – 10.0.135.167	10.0.135.167
213	10.0.135.168/31	10.0.135.168 – 10.0.135.169	10.0.135.169
214	10.0.135.170/31	10.0.135.170 – 10.0.135.171	10.0.135.171
215	10.0.135.172/31	10.0.135.172 – 10.0.135.173	10.0.135.173
216	10.0.135.174/31	10.0.135.174 – 10.0.135.175	10.0.135.175
217	10.0.135.176/31	10.0.135.176 – 10.0.135.177	10.0.135.177
218	10.0.135.178/31	10.0.135.178 – 10.0.135.179	10.0.135.179
219	10.0.135.180/31	10.0.135.180 – 10.0.135.181	10.0.135.181
220	10.0.135.182/31	10.0.135.182 – 10.0.135.183	10.0.135.183
221	10.0.135.184/31	10.0.135.184 – 10.0.135.185	10.0.135.185
222	10.0.135.186/31	10.0.135.186 – 10.0.135.187	10.0.135.187
223	10.0.135.188/31	10.0.135.188 – 10.0.135.189	10.0.135.189
224	10.0.135.190/31	10.0.135.190 – 10.0.135.191	10.0.135.191
225	10.0.135.192/31	10.0.135.192 – 10.0.135.193	10.0.135.193
226	10.0.135.194/31	10.0.135.194 – 10.0.135.195	10.0.135.195
227	10.0.135.196/31	10.0.135.196 – 10.0.135.197	10.0.135.197
228	10.0.135.198/31	10.0.135.198 – 10.0.135.199	10.0.135.199
229	10.0.135.200/31	10.0.135.200 – 10.0.135.201	10.0.135.201
230	10.0.135.202/31	10.0.135.202 – 10.0.135.203	10.0.135.203
231	10.0.135.204/31	10.0.135.204 – 10.0.135.205	10.0.135.205
232	10.0.135.206/31	10.0.135.206 – 10.0.135.207	10.0.135.207
233	10.0.135.208/31	10.0.135.208 – 10.0.135.209	10.0.135.209
234	10.0.135.210/31	10.0.135.210 – 10.0.135.211	10.0.135.211
235	10.0.135.212/31	10.0.135.212 – 10.0.135.213	10.0.135.213
236	10.0.135.214/31	10.0.135.214 – 10.0.135.215	10.0.135.215
237	10.0.135.216/31	10.0.135.216 – 10.0.135.217	10.0.135.217
238	10.0.135.218/31	10.0.135.218 – 10.0.135.219	10.0.135.219
239	10.0.135.220/31	10.0.135.220 – 10.0.135.221	10.0.135.221
240	10.0.135.222/31	10.0.135.222 – 10.0.135.223	10.0.135.223
241	10.0.135.224/31	10.0.135.224 – 10.0.135.225	10.0.135.225
242	10.0.135.226/31	10.0.135.226 – 10.0.135.227	10.0.135.227
243	10.0.135.228/31	10.0.135.228 – 10.0.135.229	10.0.135.229
244	10.0.135.230/31	10.0.135.230 – 10.0.135.231	10.0.135.231
245	10.0.135.232/31	10.0.135.232 – 10.0.135.233	10.0.135.233
246	10.0.135.234/31	10.0.135.234 – 10.0.135.235	10.0.135.235
247	10.0.135.236/31	10.0.135.236 – 10.0.135.237	10.0.135.237
248	10.0.135.238/31	10.0.135.238 – 10.0.135.239	10.0.135.239
249	10.0.135.240/31	10.0.135.240 – 10.0.135.241	10.0.135.241
250	10.0.135.242/31	10.0.135.242 – 10.0.135.243	10.0.135.243
251	10.0.135.244/31	10.0.135.244 – 10.0.135.245	10.0.135.245
252	10.0.135.246/31	10.0.135.246 – 10.0.135.247	10.0.135.247
253	10.0.135.248/31	10.0.135.248 – 10.0.135.249	10.0.135.249
254	10.0.135.250/31	10.0.135.250 – 10.0.135.251	10.0.135.251
255	10.0.135.252/31	10.0.135.252 – 10.0.135.253	10.0.135.253
256	10.0.135.254/31	10.0.135.254 – 10.0.135.255	10.0.135.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /23
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	-
/23	255.255.254.0	512	510	1
/24	255.255.255.0	256	254	2 split →
/25	255.255.255.128	128	126	4 split →
/26	255.255.255.192	64	62	8 split →
/27	255.255.255.224	32	30	16 split →
/28	255.255.255.240	16	14	32 split →
/29	255.255.255.248	8	6	64 split →
/30	255.255.255.252	4	2	128 split →
/31	255.255.255.254	2	2	256 split →
/32	255.255.255.255	1	1	512 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →